In this chapter, the narrative centers on the four friends—Athos, Porthos, Aramis, and D'Artagnan—as they navigate the treacherous political landscape involving the Cardinal and Milady. Faced with the constant threat of espionage, the group orchestrates a bold plan to hold a private meeting in one of the most dangerous locations possible: the ruins of the Bastion Saint-Gervais.
As Athos astutely observes, the Cardinal and Milady have "spies everywhere," making any conventional meeting place within the camp unsafe. To circumvent this, the musketeers decide to hold their council at the Bastion Saint-Gervais, a site of a recent battle that remains caught between the two opposing army camps. While others view the location as a "mess" and a death trap due to the proximity of enemy soldiers, Athos remains steadfast, insisting that it is the "perfect place for our meeting." By choosing a site surrounded by the remnants of conflict—where "weapons were left on the ground" and "walls were crumbling"—the musketeers effectively ensure that no spy would dare follow them into such an exposed, active war zone.
Once settled in the ruins, the atmosphere turns somber as Athos reveals the details of his recent encounter with Milady. It becomes clear that D'Artagnan has become the primary target of her vengeance, with Athos noting, "It seems our friend, D'Artagnan, is now her biggest enemy." The revelation that the Cardinal is actively assisting her in harming D'Artagnan creates a moment of despair for the young man, who questions how he can fight both powers. However, the bond of brotherhood remains the group's greatest strength; Athos calmly reassures him, "Don't forget that we are your friends and that we will help you."
The meeting is repeatedly interrupted by incoming enemy troops, turning their strategic discussion into a series of skirmishes. Despite being "greatly outnumbered," the musketeers refuse to retreat, citing Athos’s humorous yet firm requirements: "we haven't finished eating lunch yet," "we still have important business to discuss," and they had not yet been there for a "full hour." Their tactical ingenuity is further displayed when their assistants arrange discarded armor to create the illusion of a larger force, hoping to "make them think twice before attacking again."
After successfully holding their ground and completing their discussion, the musketeers return to camp to a hero’s welcome. The sight of "over two thousand soldiers" cheering for them solidifies their reputation. Even the Cardinal, despite his antagonistic stance, is forced to recognize their capability, describing their holding of the Bastion as an "amazing feat."
Ultimately, the chapter concludes with a significant shift in the power dynamics. The Cardinal, impressed by their bravery, attempts to bring the men into his orbit. In an ironic twist, he acknowledges D'Artagnan's persistent presence alongside the musketeers and suggests to Monsieur de Treville that it is finally "time he was made one of them," unintentionally rewarding the very man he sought to destroy with the formal recognition he has long desired.